This is a guide to fitting a Light Switch unit with a dimmer dial to Ford Focus without one as factory fitted.

The part used came from a C-Max MK5 PART NUMBER-4M5T13A024BA

Undo the T25 Torx and pull off the panel to the door side of the drivers area.

Unplug the ODB port from the panel so as to avoid damaging the wiring (needs 3 hands really to push 2 metal clips and pull the Port clear)

I found it was easier to reach the locating clips of the light unit from the gap at the side and had to push, pull and wiggle the unit to get it out, finally pulled forward and down to unlocate the top one first then got the bottom one clear.

I decided to follow the guide, so i bought a part a 2006 Mondeo. That part also has auto headlights.

The part will not fit my car because it is a bit larger, however all the switches and the dim was working fine.

I am going to get another part that will fit my car, but i was wondering if i should go again for the auto headlights. Has anyone tried to install those? I assume i'm gonna need the auto rear view mirror with the sensors. I might go for auto wipers too.

Managed to pick one up with an auto on it too, in anticipation for the rear view mirror upgrade!

Popped it in without probs using the guide, thank you very much! and was able to safely leave the OBD socket in place which saved some hassle, ive had a wee look though MOT guides and I don't think having an inoperative light switch position will be a problem as long as both front and rear lights turn on, only down side is its Green!! thought id been so careful checking for it but oh well, if I can be bothered ill change the SMDs to red ones one day.